Watch Marathon Dangers Online
As 40000 runners prepare for the upcoming NYC Marathon, a growing number don’t live to savor the experience. As Kimberly Dozier reports, marathons could be hazardous to some runners' health.
As 40000 runners prepare for the upcoming NYC Marathon, a growing number don’t live to savor the experience. As Kimberly Dozier reports, marathons could be hazardous to some runners' health.